NullPointerException after attempting to cancel a preview

[RoyCurtis]

Been sitting on this for a while; reporting here for record keeping.

Reported by @PugaBear ??? : https://gist.github.com/RoyCurtis/ce0428d78b29941abe2af503f07d8228

No context available (please clarify with what actions and commands trigger this exception)

[GriffinCodes]

I don't remember reporting this. Do you have a date? I could look through logs to get a more detailed report.

[RoyCurtis]

Err, I'm not sure. It was on one of my desktop sticky notes. On second thought, it might've been an exception I encountered on our own server. Sorry!